This false measure found its way into many well-known publications despite the fact that it is not authentic. I discovered this several months ago after purchasing Alfred's wonderful edition of the Well Tempered Clavier (book 1). I realized that my first recording was incorrect and decided that I should eventually remake the recording. Several weeks ago I had an astute listener further convince me when he pointed out that my recording was incorrect. So I have finally buckled down and recorded this beautiful prelude in its original form, but still with my own flair.